Answer :
A low utilization factor for a plant indicates that plant is used for stand by purpose.
asked
Mar 20, 2018
by
anonymous
Answer :
A load curve indicates average kWh (kW) energy consumption during the period.
asked
Mar 20, 2018
by
anonymous
Answer :
An induction motor has relatively high power factor at near full load.
asked
Mar 20, 2018
by
anonymous
Answer :
For high value of diversity factor, a power station of given installed capacity will be in a position to supply more number of consumers.
asked
Mar 20, 2018
by
anonymous
Description : In order to have a lower cost of electrical energy generation the load factor (1) and the diversity factor should be low (2) should be low but the diversity factor should be high (3) should be high but the diversity factor should be low (4) and the diversity factor both should be high
Answer :
In order to have a lower cost of electrical energy generation the load factor and the diversity factor both should be high
asked
Apr 29, 2018
by
anonymous
Answer :
Peak load plant can never have 100 percent load factor.
asked
Mar 20, 2018
by
anonymous
Answer :
In two part tariff, variation in load factor will affect operating or running charges.
asked
Mar 20, 2018
by
anonymous
Answer :
The load factor of domestic load is usually 10 to 15%.
asked
Mar 20, 2018
by
anonymous
Answer :
Load factor of a power station is generally less than unity.
asked
Mar 20, 2018
by
anonymous
Answer :
Load factor of a power station is defined as average load/maximum demand.
asked
Mar 20, 2018
by
anonymous
Description : Power factor of the system is kept high?
Answer :
Power factor of the system is kept high to reduce line losses, to maximise the utilization of the capacities of generators, lines and transformers, to reduce voltage regulation of the line.
asked
Mar 25, 2018
by
anonymous
Description : What is the advantage of high power factor?
Answer :
Reduced copper losses Smaller conductor size Improve voltage regulation Increase system capability Less energy bill
asked
Mar 10, 2018
by
anonymous
Description : Load factor is the (1) Ratio of maximum load on the station to sum of consumer's maximum load. (2) Ratio of average demand to maximum demand. (3) Factor used for increasing load. (4) Reciprocal of (1).
Answer :
Load factor is the Ratio of average demand to maximum demand.
asked
Apr 30, 2018
by
anonymous
Description : A transformer has negative voltage regulation when its load power factor is (1) Zero (2) Unity (3) Leading (4) Lagging
Answer :
Leading
asked
Apr 30, 2018
by
anonymous
Description : The load duration curve for unity load factor will be of (1) Rectangular shape (2) Triangular shape (3) L -shape (4) I -shape
Answer :
The load duration curve for unity load factor will be of Rectangular shape
asked
Apr 30, 2018
by
anonymous
Description : Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 20MW then annual energy production is (1) 122.8 GWh (2) 198.55 GWh (3) 128.2 GWh (4) 188.82 GWh
Answer :
Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 20MW then annual energy production is 122.8 GWh
asked
Apr 29, 2018
by
anonymous
Description : In a synchronous generator delivering lagging power factor load (1) the excitation emf leads terminal voltage by the power angle (2) the excitation emf lags terminal voltage by the power angle (3) excitation emf leads the terminal voltage by the power factor angle (4) excitation emf lags the terminal voltage by the power factor angle
Answer :
In a synchronous generator delivering lagging power factor load the excitation emf leads terminal voltage by the power angle
asked
Apr 29, 2018
by
anonymous
Answer :
The power factor of a single phase load can be calculated if the instruments available are three ammeters or three voltmeters.
asked
Mar 21, 2018
by
anonymous
Description : Minimum voltage regulation occurs when the power factor of the load is?
Answer :
Minimum voltage regulation occurs when the power factor of the load is leading.
asked
Mar 19, 2018
by
anonymous
Description : If the load of the normally excited synchronous motor is increased the power factor will?
Answer :
If the load of the normally excited synchronous motor is increased the power factor will become lagging.
asked
Mar 18, 2018
by
anonymous
Description : The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Answer :
The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.
asked
Mar 18, 2018
by
anonymous
Answer :
Depreciation charges are high in case of thermal plant.
asked
Mar 20, 2018
by
anonymous
Description : The following formula is correct: (A) Load factor=Average load for a period/ Peak load for the same period (B) Load factor=Average load for a period x Peak load for the same period (C) Load factor=Average load for a period + Peak load for the same period (D) All of the above
Answer :
The following formula is correct: (A) Load factor=Average load for a period/ Peak load for the same period (B) Load factor=Average load for a period x Peak load for the same period (C) Load factor=Average load for a period + Peak load for the same period (D) All of the above
asked
May 8, 2018
by
anonymous
Answer :
In a distribution system, in order to improve power factor, the synchronous capacitors are installed at the receiving end.
asked
Mar 20, 2018
by
anonymous
Answer :
For a consumer the most economical power factor is generally 0.95 lagging .
asked
Mar 20, 2018
by
anonymous
Answer :
In an interconnected system, the diversity factor of the whole system increases.
asked
Mar 20, 2018
by
anonymous
Answer :
The primary reason for low power factor is supply system is due to installation of induction motors.
asked
Mar 20, 2018
by
anonymous
Answer :
Power plant having maximum demand more than the installed rated capacity will have utilisation factor more than unity.
asked
Mar 20, 2018
by
anonymous
Answer :
Diversity factor has direct effect on the fixed cost of unit generated.
asked
Mar 20, 2018
by
anonymous
Answer :
Demand factor is defined as maximum demand/connected load.
asked
Mar 20, 2018
by
anonymous
Description : Can a synchronous condenser improve power factor?
Answer :
Yes, synchronous condenser can improve power factor.
asked
Mar 19, 2018
by
anonymous
Description : What is the maximum value of power factor?
Answer :
1 is the maximum value of power factor.
asked
Mar 19, 2018
by
anonymous
Description : Compare base load plant with peak load plant.
Answer :
Sr.No. Points Base load plant Peak load plant 1 Definition The power plant which supplies base load of load curve is known as base load plant The power ... power station Small capacity storage hydro, pumped storage hydro, gas, diesel power station.
asked
Jul 24, 2019
by
anonymous
Answer :
1. Connected Load: It is the sum of load of all equipment's connected to supply system which are in use or not in use of each consumer. OR The sum of connected load of all consumers ... is the maximum load which a consumer uses at a particular time period out of his total connected load.
asked
Jul 24, 2019
by
anonymous
Answer :
Nuclear power plant is invariably used as base load plant.
asked
Mar 20, 2018
by
anonymous
Answer :
Generators for peak load plants are usually designed for maximum efficiency at 50 to 75 percent full load.
asked
Mar 20, 2018
by
anonymous
Answer :
In a load curve the highest point represents peak demand.
asked
Mar 20, 2018
by
anonymous
Answer :
Generating capacity connected to the bus bars and ready to take load when switched on is known as spinning reserve.
asked
Mar 20, 2018
by
anonymous
Answer :
The increased load during summer months is due to increased use of fans and air conditioners.
asked
Mar 20, 2018
by
anonymous
Answer :
Load curve is useful in deciding the operating schedule of generating units, sizes of generating units, total installed capacity of the plant.
asked
Mar 20, 2018
by
anonymous
Answer :
The area under a load curve gives energy consumed.
asked
Mar 20, 2018
by
anonymous
Description : Sparking occurs when a load is switched off because the circuit has high?
Answer :
Sparking occurs when a load is switched off because the circuit has high inductance.
asked
Mar 25, 2018
by
anonymous
Answer :
The standard full-load power factor ratings for synchronous motors are unity or 0.8 leading.
asked
Mar 20, 2018
by
anonymous
Description : State the advantages of use of high voltage in transmission of Electric power.
Answer :
Advantages: 1. As Transmission voltage increases, current decreases. 2. As current decreases, cross section of conductor decreases. 3. As cross section of conductor decreases, its ... high voltage transmission line, successful interconnection of transmission line is possible than low voltage.
asked
May 22, 2020
by
anonymous
Description : Limitation and application of High Voltage DC (HVDC)
Answer :
Limitation and application of High Voltage DC (HVDC) : Limitation:- 1) It is difficult to step up and step down DC voltage like AC voltage. 2) Special cooling ... conventional/non-conventional) 12) Increasing existing grid utilization. 13) Interconnection of different grids or networks
asked
Aug 25, 2019
by
anonymous
Description : Name two methods for measurement of low, medium and high resistance. Give one advantage and one limitation of V- I method.
Answer :
Methods for measurement of low resistance: 1. Ammeter voltmeter method 2. Kelvin's bridge method 3. Ohm meter method 4. Potentiometer method 5. Digital/analog multi-meter ... must be infinity for perfectly accurate measurement which is not possible. 2. Connection errors.
asked
Sep 6, 2018
by
anonymous
Description : Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO
Answer :
Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO
asked
Jun 18, 2018
by
anonymous
Description : Which of the following circuit breakers has high reliability & minimum maintenance? (A) Bulk oil type CB (B) Air blast CB (C) Vacuum CB (D) Sulphur hexafluoride CB
Answer :
Which of the following circuit breakers has high reliability & minimum maintenance? (A) Bulk oil type CB (B) Air blast CB (C) Vacuum CB (D) Sulphur hexafluoride CB
asked
May 8, 2018
by
anonymous
Description : Step-down transformer converts high voltage and low current into: (A) How voltage and high current (B) High voltage and low current (C) Low voltage and high current (D) None of the above
Answer :
Step-down transformer converts high voltage and low current into: Low voltage and high current
asked
May 8, 2018
by
anonymous
Description : The number of cycles in which a high speed circuit breaker can complete its operation is (A) 3 to 8 (B) 10 to 18 (C) 20 to 30 (D) 40 to 50
Answer :
The number of cycles in which a high speed circuit breaker can complete its operation is 3 to 8
asked
May 8, 2018
by
anonymous